Sig Sauer Cal-X Kit SIGMCX 5.56 NATO 11.5" Tapered Lug CALX-MCX-11B-556-TAP
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Aug 26, 2026
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Sig Sauer 5.56 NATO caliber exchange kit for the MCX with a 16" barrel. Sig Sauer Cal-X Kit SIGMCX 5.56 NATO 11.5" Tapered Lug CALX-MCX-11B-556-TAP
